lean_ctx/tool_defs/
mod.rs

1use std::sync::Arc;
2
3use rmcp::model::Tool;
4use serde_json::{json, Map, Value};
5
6mod granular;
7pub use granular::{granular_tool_defs, list_all_tool_defs, unified_tool_defs};
8
9pub fn tool_def(name: &'static str, description: &'static str, schema_value: Value) -> Tool {
10    let schema: Map<String, Value> = match schema_value {
11        Value::Object(map) => map,
12        _ => Map::new(),
13    };
14    Tool::new(name, description, Arc::new(schema))
15}
16
17const CORE_TOOL_NAMES: &[&str] = &[
18    "ctx_read",
19    "ctx_multi_read",
20    "ctx_call",
21    "ctx_shell",
22    "ctx_search",
23    "ctx_tree",
24    "ctx_edit",
25    "ctx_session",
26    "ctx_knowledge",
27];
28
29pub fn lazy_tool_defs() -> Vec<Tool> {
30    let all = granular_tool_defs();
31    let mut core: Vec<Tool> = all
32        .into_iter()
33        .filter(|t| CORE_TOOL_NAMES.contains(&t.name.as_ref()))
34        .collect();
35
36    core.push(tool_def(
37        "ctx_discover_tools",
38        "Search available lean-ctx tools by keyword. Returns matching tool names + descriptions for on-demand loading.",
39        json!({
40            "type": "object",
41            "properties": {
42                "query": {
43                    "type": "string",
44                    "description": "Search keyword (e.g. 'graph', 'cost', 'workflow', 'dedup')"
45                }
46            },
47            "required": ["query"]
48        }),
49    ));
50
51    core
52}
53
54pub fn discover_tools(query: &str) -> String {
55    let all = list_all_tool_defs();
56    let query_lower = query.to_lowercase();
57    let matches: Vec<(&str, &str)> = all
58        .iter()
59        .filter(|(name, desc, _)| {
60            name.to_lowercase().contains(&query_lower) || desc.to_lowercase().contains(&query_lower)
61        })
62        .map(|(name, desc, _)| (*name, *desc))
63        .collect();
64
65    if matches.is_empty() {
66        return format!("No tools found matching '{query}'. Try broader terms like: graph, cost, session, search, compress, agent, workflow, gain.");
67    }
68
69    let mut out = format!("{} tools matching '{query}':\n", matches.len());
70    for (name, desc) in &matches {
71        let short = if desc.len() > 80 { &desc[..80] } else { desc };
72        out.push_str(&format!("  {name} — {short}\n"));
73    }
74    out.push_str(
75        "\nIf your MCP client registers tools only once at startup (static tools/list), \
76use ctx_call (available in lazy mode) to invoke discovered tools:\n\
77  ctx_call {\"name\":\"ctx_graph\",\"arguments\":{\"action\":\"status\"}}\n",
78    );
79    out
80}
81
82pub fn is_full_mode() -> bool {
83    std::env::var("LEAN_CTX_FULL_TOOLS").is_ok()
84        || std::env::var("LEAN_CTX_LAZY_TOOLS")
85            .is_ok_and(|v| v == "0" || v.eq_ignore_ascii_case("false"))
86}
lean_ctx/tool_defs/mod.rs

lean_ctx/tool_defs/
mod.rs
